66075223 has 2 divisors, whose sum is σ = 66075224. Its totient is φ = 66075222.

The previous prime is 66075187. The next prime is 66075241. The reversal of 66075223 is 32257066.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66075223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66075263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33037611 + 33037612.

It is an arithmetic number, because the mean of its divisors is an integer number (33037612).

Almost surely, 2^66075223 is an apocalyptic number.

66075223 is a deficient number, since it is larger than the sum of its proper divisors (1).

66075223 is an equidigital number, since it uses as much as digits as its factorization.

66075223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 66075223 is about 8128.6667418464. Note that the first 3 decimals coincide. The cubic root of 66075223 is about 404.2774761933.

The spelling of 66075223 in words is "sixty-six million, seventy-five thousand, two hundred twenty-three".